CVE-2025-59826 FlagForgeCTF Vulnerable to Unauthorized Problem Creation
Non-admin users can create arbitrary challenges, allowing malicious or misleading content injection in the FlagForgeCTF platform.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-59826?
CVE-2025-59826 is a high-severity missing authorization vulnerability in FlagForgeCTF flagForge, published on 23 Sep 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Flag Forge is a Capture The Flag (CTF) platform. In version 2.1.0, non-admin users can create arbitrary challenges, potentially introducing malicious, incorrect, or misleading content. This issue has been patched in version 2.2.0.
Weakness: CWE-862
Which versions are affected by CVE-2025-59826?
It affects 1 product.
Products include Flagforge Flagforge.
How do I fix CVE-2025-59826?
No fix has been published for CVE-2025-59826 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2025-59826 being exploited?
There is no known exploitation of CVE-2025-59826 in the wild and no public exploit code.
Other vulnerabilities in FlagForgeCTF flagForge
- CVE-2025-59841 FlagForgeCTF's Improper Session Handling Allows Access After Logout
- CVE-2025-61777 FlagForge Allows Unauthenticated Badge Template API Access
- CVE-2025-59932 FlagForgeCTF Unauthenticated Resource Modification/Deletion
- CVE-2025-59827 FlagForgeCTF is Missing Authorization in main-v2
- CVE-2026-21868 Flag Forge has ReDoS Vulnerability in User Profile Lookup API